spring-data-elasticsearch and update

Question

我正在使用spring-data-elasticsearch来做CRUD操作。

我有一个自定义存储库，它扩展了ElasticsearchRepository。

最终，ElasticsearchRepository扩展了CrudRepository，这意味着更新现有记录是可能的。

问题是，你如何做到这一点？我还没有找到名为"update()“的方法

我认为这样做是可行的(从https://github.com/BioMedCentralLtd/spring-data-elasticsearch-sample-application窃取代码)

    //create
    Book book = new Book();
    book.setId("123455");
    book.setName("Spring Data Elasticsearch");
    book.setVersion(System.currentTimeMillis());
    repository.save(book);

    //update
    book.setName("THIS IS A COMPLETELY NEW TITLE");
    repository.save(book); 

但是，第二次保存会抛出InvocationTargetException

使用调试器检查它会显示：

[book][0] [book][123455]: version conflict, current [1447792071681], provided [1447792071681]

Book对象如下所示：

@Document(indexName = "book",type = "book" , shards = 1, replicas = 0, indexStoreType = "memory", refreshInterval = "-1")
public class Book {

    @Id
    private String id;
    private String name;
    private Long price;
    @Version
    private Long version;

    public Map<Integer, Collection<String>> getBuckets() {
        return buckets;
    }

    public void setBuckets(Map<Integer, Collection<String>> buckets) {
        this.buckets = buckets;
    }

    @Field(type = FieldType.Nested)
    private Map<Integer, Collection<String>> buckets = new HashMap();

    public Book(){}

    public Book(String id, String name,Long version) {
        this.id = id;
        this.name = name;
        this.version = version;
    }

    getters and setters removed for space

}

我的存储库代码甚至更简单：

import org.springframework.data.elasticsearch.entities.Book;
import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;

public interface BookRepository extends ElasticsearchRepository<Book, Long> {

}

我必须提供更新方法吗？

编辑：

不要紧。我将更新更改为：

    //update
    book.setName("THIS IS A COMPLETELY NEW TITLE");
    book.setVersion(System.currentTimeMillis());
    repository.save(book); 

它更新了记录。

Answer 1

您可以使用UpdateQuery和ElasticSearchTemplate更新任何部分文档。e.g

    final UpdateRequest updateRequest = new UpdateRequest();
    updateRequest.index(mainIndexName);
    updateRequest.type(typeName);
    updateRequest.id(id);
    updateRequest.doc(XContentFactory.jsonBuilder().startObject()
                        .field("accountType", accountType)
                        .endObject());
    final UpdateQuery updateQuery = new UpdateQueryBuilder().withId(id)
                        .withClass(<DocumentClass>).withUpdateRequest(updateRequest).build();
    UpdateResponse updateResponse =  elasticSearchTemplate.update(updateQuery);

Answer 2

我将索引文档更新为以下代码片段：

        IndexRequest indexRequest = new IndexRequest(INDEX_NAME,INDEX_NAME,docid);
        indexRequest.source(fldName, fldValue);
        UpdateRequest updateRequest = new UpdateRequest();
        updateRequest.index(INDEX_NAME);
        updateRequest.type(INDEX_NAME);
        updateRequest.id(docid);
        updateRequest.doc(indexRequest);
        try {
            UpdateResponse res=client.update(updateRequest).get();
            logger.info("update es {}:{}",fe,res.getGetResult());
        } catch (Exception e) {
            logger.error("update",e);
            throw e;
        }

Answer 3

第二次更新失败，因为您正在尝试更新一个版本未更改的实体。你得到的错误信息是告诉你，“嘿，你不能将同一个版本保存两次！”试试这个：

//create
Book book = new Book();
book.setId("123455");
book.setName("Spring Data Elasticsearch");
book.setVersion(System.currentTimeMillis());
repository.save(book);

//update
book.setName("THIS IS A COMPLETELY NEW TITLE");
book.setVersion(System.currentTimeMillis()); // you're saving a new version
repository.save(book);